9a0f254687
The AtomicNarrow operations are currently used for wider 64-bit operations, that only operate on 32-bits of data or less (Ex:I64AtomicAdd8U). Removing these because this can be handled in int64-lowering by zeroing the higher order node. Explicitly zeroing these in code-gen is not required because - - The spec requires only the data exchange to be atomic, for narrow ops this uses only the low word. - The return values are not in memory, so are not visible to other workers/threads BUG:v8:6532 Change-Id: I90a795ab6c21c70cb096f59a137de653c9c6a178 Reviewed-on: https://chromium-review.googlesource.com/1194428 Reviewed-by: Ben Titzer <titzer@chromium.org> Reviewed-by: Ben Smith <binji@chromium.org> Commit-Queue: Deepti Gandluri <gdeepti@chromium.org> Cr-Commit-Position: refs/heads/master@{#55499}
70 lines
1.3 KiB
C++
70 lines
1.3 KiB
C++
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef WASM_ATOMICOP_UTILS_H
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#define WASM_ATOMICOP_UTILS_H
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#include "test/cctest/cctest.h"
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#include "test/cctest/compiler/value-helper.h"
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#include "test/cctest/wasm/wasm-run-utils.h"
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namespace v8 {
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namespace internal {
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namespace wasm {
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#define OPERATION_LIST(V) \
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V(Add) \
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V(Sub) \
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V(And) \
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V(Or) \
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V(Xor) \
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V(Exchange)
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typedef uint64_t (*Uint64BinOp)(uint64_t, uint64_t);
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typedef uint32_t (*Uint32BinOp)(uint32_t, uint32_t);
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typedef uint16_t (*Uint16BinOp)(uint16_t, uint16_t);
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typedef uint8_t (*Uint8BinOp)(uint8_t, uint8_t);
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template <typename T>
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T Add(T a, T b) {
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return a + b;
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}
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template <typename T>
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T Sub(T a, T b) {
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return a - b;
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}
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template <typename T>
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T And(T a, T b) {
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return a & b;
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}
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template <typename T>
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T Or(T a, T b) {
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return a | b;
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}
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template <typename T>
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T Xor(T a, T b) {
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return a ^ b;
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}
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template <typename T>
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T Exchange(T a, T b) {
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return b;
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}
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template <typename T>
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T CompareExchange(T initial, T a, T b) {
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if (initial == a) return b;
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return a;
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}
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} // namespace wasm
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} // namespace internal
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} // namespace v8
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#endif
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